Filtering-bed.



, P. P. BUSSMAN.

FILTERING BBD.

APPLIGATION FILED APB.. 24.1908.

Patented Aug. 17, 1909.

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PAUL F. BUSSMANOF VBUFFALO, NEW YORK.

FILTERING-BED.

' Specification of Letters Patent.

Patented Aug. 17, 1909.

Application'vled April 24., 1908. Serial No. 429,063.

To all 'whom 'it may concern:

Be it known that I, PAUL EBUSSMAN, a citizen of the United States of America, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Filtering-Beds, of which the following is a specification. 4

This invention relates to filtering beds for water supply systems, and one of the principal objects of the saine is to provide a filter.- ing bed at the bottom of the lake, stream. or river from which the water supply is furnished and to locate the suction pipes im mediately under the filter bed so that the water drawn into the inlet ends of the suction pipes is filtered before it is conveyed to the reservoir to besupplied to the cityor town.

Heretofore it has been the usual practice toA take the water from the bed of a stream or lake and convey it to a reservoir where a filtering plant is required to filter the water before it is furnished to the city ortown.

it is the principal object of myinvention to filter the water before it is admitted to the reservoir, thus saving in the expense of filtration after the water has been supplied to the reservoir. v

rPhe objects and advantages above referred to may be attained by means of the construction illustrated in the accompanying draw ing, in which, d

Figure l is aplan view of a perforated platform partially broken away for sustaining a filtering bed, and showing the suction pipes underneath the platform. Fig. 2 is a sectional view showing a filtering bed made in accordance with my invention.

Referring` to the drawing for a more specific description of. my invention, the. numeral l designates rectangular blocks of concrete or plates of metal provided with suitable perforations 2, said perforations extending through the plate or block, and a series of such plates or blocks being arranged preferably with beveled edges 3 and supported upon suitable legs t a slight distance above the bed of a river, lake or stream from which the water supply `is to be furnished. Extending around the platform and inclosing the underside thereof are the plates or slabs of concrete 5 forming an inclined wall comvpletely around the platform. Placed upon the platform thus made is a layer of large broken stone 6. This layer may be two or more inches in thickness. Placed upon the layer 6 of stone is a layer of coarse gravel 7 and upon this layer anotherlayer of still finer gravel 8, and then a layer 9 of sand and gravel mixed. may be placed upon the layer 8, while the top layer l() may be of siX or eight inches thickness and composed of fine white sharp sand. However, it will be understood that other filtering materials may be used and that any required thickness of layer may be resorted to. The suction pipes l1 are provided with curved intake joints l2, and these pipes may be arranged, as shown in Fig. l, provided with suitable branches spaced apart and each branch having an intake joint or nozzle '12.

From the foregoing it will be obvious that the filter bed Vis inclosed vupon all sides and that the water to be supplied through the suction pipes ll must be drawn through the filter bed. Thus the supply of water at the reservoir will be comparatively clear and i lilnpid.

`The openings in the platform may be made quite large, and these openings may be filled with asbestos, mineral wool or other material to act as a secondary filter. The open ends of the pipes for drawing off the filtered water may also be supplied with asbestos, mineral ywool or other filtering subi stance to still further purify the water.

Having thus described the invention, what is claimed as new, is zrPhe herein described filtering bed comprising a platform made up of rectangular blocks provided with perforations, said platform being supported above the bed of a .stream and provided with inclined imperforate side and end walls which entirely inclose the space underneath the platform, filtering material placed upon the platform, and suction pipes extending through the side walls, said suction pipes being disposed underneath the platform with their intake ends directed upwardly, the perforations in said blocks being filled with filtering material and the mouth of the intake pipes containing the filtering material.

In testimony whereof I affix my signature in presence of two witnesses.

PAUL F. BUSSMAN. Witnesses:

CLEMENS A. BUssMAN, L. Voer. 

